question 1 -line integral

Evaluate the integral of C xdy-ydx along the curve C given by the equation y=x^3 from (0,0) to (2,8).

question 2 - work

Find the work done in moving an object through the vector field

F<x,y> = <-y,x> along the upper semicircle x^2 + y^2 =1 from A(1,0) to B(-1,0).

Please HELP ! Thank you very much.